255/50R17 tire size
255/50R17 is a metric size: 27.0" tall, 10.0" wide, on a 17" rim — about a 27x10.00R17. The sidewall is 5.0" and the tire turns 746 times per mile.
255/50R17 specs
| Overall diameter (height) | 27.04" · 687 mm |
|---|---|
| Section width | 10.04" · 255 mm |
| Sidewall height | 5.02" · 127 mm (50% of width) |
| Rim diameter | 17" |
| Circumference | 84.95" · 2.158 m |
| Revolutions per mile | 746 (463 per km) |
| Inch (flotation) equivalent | 27x10.00R17 |
Equivalent sizes on a 17" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 225/50R17 common | 25.86" | -4.37% | -30 mm | 57.4 mph | calculate → |
| 225/55R17 common | 26.74" | -1.09% | -30 mm | 59.3 mph | calculate → |
| 235/55R17 common | 27.18" | +0.51% | -20 mm | 60.3 mph | calculate → |
| 215/55R17 common | 26.31" | -2.69% | -40 mm | 58.4 mph | calculate → |
| 225/60R17 common | 27.63" | +2.18% | -30 mm | 61.3 mph | calculate → |
| 235/60R17 common | 28.10" | +3.93% | -20 mm | 62.4 mph | calculate → |
| 215/65R17 common | 28.00" | +3.57% | -40 mm | 62.1 mph | calculate → |
| 215/60R17 common | 27.16" | +0.44% | -40 mm | 60.3 mph | calculate → |
| 235/50R17 common | 26.25" | -2.91% | -20 mm | 58.3 mph | calculate → |
| 205/55R17 | 25.88" | -4.30% | -50 mm | 57.4 mph | calculate → |
| 245/50R17 | 26.65" | -1.46% | -10 mm | 59.1 mph | calculate → |
| 255/45R17 | 26.04" | -3.71% | 0 mm | 57.8 mph | calculate → |
| 245/55R17 | 27.61" | +2.11% | -10 mm | 61.3 mph | calculate → |
| 335/35R17 | 26.23" | -2.98% | +80 mm | 58.2 mph | calculate → |
| 165/80R17 | 27.39" | +1.31% | -90 mm | 60.8 mph | calculate → |
| 305/45R17 | 27.81" | +2.84% | +50 mm | 61.7 mph | calculate → |
| 195/60R17 | 26.21" | -3.06% | -60 mm | 58.2 mph | calculate → |
| 155/90R17 | 27.98" | +3.49% | -100 mm | 62.1 mph | calculate → |
| 255/55R17 | 28.04" | +3.71% | 0 mm | 62.2 mph | calculate → |
| 285/40R17 | 25.98" | -3.93% | +30 mm | 57.6 mph | calculate → |
| 155/80R17 | 26.76" | -1.02% | -100 mm | 59.4 mph | calculate → |
| 145/80R17 | 26.13" | -3.35% | -110 mm | 58.0 mph | calculate → |
| 175/65R17 | 25.96" | -4.00% | -80 mm | 57.6 mph | calculate → |
| 145/90R17 | 27.28" | +0.87% | -110 mm | 60.5 mph | calculate → |
| 275/50R17 | 27.83" | +2.91% | +20 mm | 61.7 mph | calculate → |
| 28x6.00R17 | 28.00" | +3.55% | -103 mm | 62.1 mph | calculate → |
| 26x6.00R17 | 26.00" | -3.84% | -103 mm | 57.7 mph | calculate → |
| 185/60R17 | 25.74" | -4.80% | -70 mm | 57.1 mph | calculate → |
| 205/60R17 | 26.69" | -1.31% | -50 mm | 59.2 mph | calculate → |
| 205/65R17 | 27.49" | +1.67% | -50 mm | 61.0 mph | calculate → |
| 295/40R17 | 26.29" | -2.77% | +40 mm | 58.3 mph | calculate → |
| 345/40R17 | 27.87" | +3.06% | +90 mm | 61.8 mph | calculate → |
| 165/70R17 | 26.09" | -3.49% | -90 mm | 57.9 mph | calculate → |
Plus / minus sizing: 16" and 18" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 235/50R18 common | 27.25" | +0.79% | -20 mm | 60.5 mph | calculate → |
| 225/50R18 common | 26.86" | -0.67% | -30 mm | 59.6 mph | calculate → |
| 215/65R16 common | 27.00" | -0.13% | -40 mm | 59.9 mph | calculate → |
| 255/45R18 common | 27.04" | -0.01% | 0 mm | 60.0 mph | calculate → |
| 235/60R16 common | 27.10" | +0.23% | -20 mm | 60.1 mph | calculate → |
| 205/70R16 | 27.30" | +0.96% | -50 mm | 60.6 mph | calculate → |
| 295/40R18 | 27.29" | +0.93% | +40 mm | 60.6 mph | calculate → |
| 285/40R18 | 26.98" | -0.23% | +30 mm | 59.9 mph | calculate → |
| 155/90R16 | 26.98" | -0.20% | -100 mm | 59.9 mph | calculate → |
| 165/70R18 | 27.09" | +0.20% | -90 mm | 60.1 mph | calculate → |
| 325/35R18 | 26.96" | -0.31% | +70 mm | 59.8 mph | calculate → |
| 145/80R18 | 27.13" | +0.35% | -110 mm | 60.2 mph | calculate → |
| 355/40R16 | 27.18" | +0.52% | +100 mm | 60.3 mph | calculate → |
| 195/60R18 | 27.21" | +0.64% | -60 mm | 60.4 mph | calculate → |
Try another size against 255/50R17
Questions
What size is 255/50R17 in inches?
255/50R17 is about 27.0" tall and 10.0" wide on a 17-inch rim — roughly a 27x10.00R17 in inch sizing.
What does 255/50R17 mean?
255 mm section width, sidewall 50% of the width (5.02"), radial construction, 17-inch rim.
What tire sizes are equivalent to 255/50R17?
On the same 17" rim, within 3% of the diameter: 215/60R17 (+0.44%), 235/55R17 (+0.51%), 145/90R17 (+0.87%), 155/80R17 (-1.02%), 225/55R17 (-1.09%), 205/60R17 (-1.31%).
How many revolutions per mile does a 255/50R17 tire make?
About 746 revolutions per mile (circumference 84.9").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.